CMN.ATO.IITR.310105 - Work related self-education expense item details on attached Work Related Expenses schedule required
Please check what is relevant to your issue:
1. Turn off "Work Related Expenses" from financial image. Please remove the module/values if you are NOT reporting any values.
2. If you have to report a values, try to emulate below example-
In this case, error is coming from D3 and D4.
Click on that amount, and make sure to fill ALL information
And push "Validate" to check if your form is now valid.